Does Garlic Prevent Colds? Fact or Myth About Lehsun
Partly true, mostly unproven. Garlic (lehsun) is a fine food and has a long place in home kitchens, but there is not enough good evidence to say it stops a cold. Enjoy it for flavour, and do not count on it as protection.
Fact or myth: garlic and colds
- Verdict: Unproven. Not a myth to mock, not a fact to rely on.
- What is true: Garlic is a flavourful, widely eaten food and a traditional home remedy.
- What to do instead: Wash hands, rest, drink fluids, and see a doctor for warning signs.
- Kitchen tip: Crush it and let it rest before cooking for better flavour.
Prefer to listen? This post as a 2 min video · Watch the video
One more check for our Fact or Myth shelf. Got this forward on WhatsApp? Send back the checked version.
Why do people believe lehsun stops colds?
Garlic is sharp, hot and strong smelling, and anything that strong feels like it must be doing something. Across South Asia and many other places, households have used lehsun in soups, in nazla remedies and as a winter food for generations. When a person eats it and the cold passes a few days later, the link feels obvious. Yet most colds clear by themselves in about a week or so, whatever we eat on the way.
That is tradition at work, and it deserves respect. It is not proof, though, and it is worth keeping the two apart.
What does the evidence say about garlic and the common cold?
A Cochrane review, which is a careful pooling of trial evidence, concluded there is not enough evidence to say whether garlic prevents or helps with colds. It found one trial that suggested garlic might lower the number of colds, and said more trials are needed to confirm it. The reviewers also noted that claims for garlic rest largely on poor quality evidence.
The US National Center for Complementary and Integrative Health says much the same: very little research supports the idea that garlic supplements help during cold season, and the small number of reports it mentions had weaknesses. So the honest verdict is “we do not know, and the proof offered so far is thin.”
A similar story applies to vitamin C, which our post on whether vitamin C stops colds walks through. Both are cases where a popular habit has far more fans than proof.
What is true about garlic?
Garlic is a perfectly good food. It adds flavour to daal, curries, chutneys and soups, so a warm bowl of lehsun soup on a snuffly evening can make you feel looked after. Comfort and hydration are real things. Our day by day guide to nazla and zukam at home shows what actually eases a cold: rest, warm fluids, steam and time.
Garlic also turns up in blood pressure folk advice, which is a separate question covered in our piece on lehsun, namak and walking for blood pressure.
Kitchen tip: crush, rest, then cook
Chop or crush the cloves, then leave them on the board for about 10 minutes before they hit the heat. Many cooks do this because the flavour comes out stronger and rounder. Treat it as a flavour habit from the kitchen, not a promise of any health effect.
What are the real cautions with garlic?
- Raw garlic on an empty stomach can cause heartburn, stomach pain, gas and nausea in some people. If it upsets you, eat it cooked and with food.
- Surgery and blood thinners: The NCCIH notes that garlic supplements may raise bleeding risk, so tell your doctor before surgery or if you take blood thinning medicine or aspirin.
- Skin: Fresh raw garlic placed on the skin can cause severe irritation and chemical burns. Do not leave it on skin, and never tape it on.
- Children’s ears and noses: Never put garlic, garlic oil or any home liquid into a child’s ear or nose. Garlic pieces are also a choking risk for small children.
- Homemade jars: Garlic stored in honey or oil can grow dangerous bacteria. See honey garlic jar and botulism safety. Honey is never for babies under 1 year.
Myth: eating garlic daily means I will not catch a cold
No food guarantees that. Colds spread through germs on hands and in the air, so the dependable steps are hand washing, not sharing cups, and staying home while unwell. Garlic can sit happily on your plate alongside all that. It just cannot do the job of those habits.
Limits and when to see a doctor
Garlic should never replace medicine you have been prescribed, and nothing here is a reason to start, stop or change a medicine. See a doctor if a fever lasts more than 3 days, if symptoms last longer than 10 days without easing, or if you have chest pain, trouble breathing or a stiff neck. A baby under 3 months with a fever needs a doctor the same day. People on blood thinners, or with surgery coming up, should ask before eating a lot of garlic or any garlic product.
Common questions about garlic and colds
Does garlic prevent colds?
There is not enough good evidence to say so. A Cochrane review found only one trial hinting at a possible benefit and called for more research.
Lehsun se nazla theek hota hai?
It is a traditional home remedy, but nazla usually settles by itself with rest and fluids. Garlic has not been shown to speed that up.
Is raw garlic good for a cold?
It is not proven to help, and raw garlic can upset the stomach or cause heartburn. Cooked garlic in food is gentler and still tasty.
Lehsun khane ke nuksan kya hain?
Common ones are bad breath, body odour, gas, heartburn and nausea. Some people are allergic, and garlic may add to bleeding risk around surgery.
Is garlic good for cough?
A cough from a cold usually fades with time, warm drinks and rest. Garlic is not a proven cough remedy, and a cough lasting over 3 weeks needs a doctor.
Is garlic and honey good for a cold?
Warm honey in water can soothe a throat in anyone over 1 year old. The garlic part is unproven, and a stored garlic and honey jar carries a real bacteria risk if made wrongly.
Can I put garlic in a child’s ear?
No. Nothing should go into a child’s ear at home, and garlic can irritate the skin. Take earache to a doctor.
Lehsun subah khali pet khana theek hai?
It can cause heartburn or stomach pain in some people. If it does not suit you, have it cooked with a meal instead.
How much garlic is safe to eat?
Ordinary cooking amounts, such as a few cloves in a family pot, are fine for most healthy adults. Large raw amounts are more likely to upset the stomach, and people on blood thinners should ask their doctor.